Hervey de Saint Denys made an intense study of Chinese, and in 1851 D'Hervey published his Recherches sur l'agriculture et l'horticulture des Chinois (Transl: Research on the agriculture and horticulture of the Chinese), in which he dealt with the plants and animals that potentially might be able to be acclimatized to and introduced in Western countries.

[3] D'Hervey also created a literary translation theory, paraphrased by Joshua A. Fogel, the author of a book review on De l'un au multiple: Traductions du chinois vers les langues européenes, as "empowering the translator to use his own creative talents to embellish wherever necessary—not a completely free hand, but some leeway to avoid the pitfall of becoming too leaden.

In a footnote on page 1 from the 1878-edition of Alfred Maury's work Le sommeil et les rêves D'Hervey de Saint-Denys was identified as the writer of it.

Sigmund Freud (Die Traumdeutung.Wien; Deuticke.1900) e.g. states: "Maury, le sommeil et les rêves, Paris,1878, p.19, polemisiert lebhaft gegen d'Hervey, dessen Schrift ich mir trotz aller Bemühung nicht verschaffen konnte"(Transl.

:Maury, Sleep and Dreams, Paris,1878, p. 19, argues strenuously against d'Hervey, whose book I could not lay hands on in spite of all my efforts).

In an article from Den Blanken & Meijer, the authors wondered about the fact that there were so little biographical data available on such an erudite person as Saint-Denys was, and presented some.

Leading dream specialists Carolus den Blanken, Celia Green, Paul Tholey (1937-1998) and Oniros president-elect Roger Ripert paid their respect.

[21] In 1995 society Oniros published an integral French version of Denys' book on dreams, and Italian, Dutch and Japanese translations appeared.

In 2016 an integral English version (inclusive the original frontpage, backcover and frontispice) appeared as a free of charge E-book with the title:'Dreams and the Ways to Direct Them: Practical Observations', edited by Drs.

In this translation, the designer of the front cover of the 1867-original is revealed, namely Henri Alfred Darjou (1832-1875), French painter and draughtsman.